Synopsis

(Required) The inherent nature of floating-point types is such that comparisons of equality will often not evaluate to true even when they are expected to.

Enabled by default

Yes

Severity/Certainty

Medium/Medium

Full description

An operand of essentially floating type is used as the operand to equal or not equal operator.

Coding standards

Code examples

The following code example fails the check and will give a warning:

void example(int n)
{
  float f = 3.0f;
  if (f == n); /* fail, comparison of a float and an int */
}

The following code example passes the check and will not give a warning about this issue:

void example(int n)
{
  float f = 3.0f;
  if (f > n); /* pass, comparison of a float and an int */
}